Patent US3674737A successfully refreshed from Google Patents.
US3674737A
Expired / Lapsed
US
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Reaction products of dialkyltin oxides and higher dialkyltin monohydric aliphatic saturated alcohol esters of thiomalic and thiolactic acids
Assignee: Argus Chemical Corp
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Filing: 1971-01-22
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Granted: 1972-07-04
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Expires: 1991-01-22
Abstract
Abstract Reaction products of higher dialkyltin oxides and higher dialkyltin monohydric saturated alcohol esters of thiomalic and thiolactic acid are provided, that are excellent stabilizers for polyvinyl chloride resins.
Inventors
- 👤 Lawrence R Brecker
- 👤 Alfred Thee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:48
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/56; C08K5/57
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
14 words
A polyvinyl chloride resin composition according to claim 1 comprising a polyvinyl chloride homopolymer.
Claim 2
Dependent Claim
17 words
A rigid polyvinyl chloride resin composition in accordance with claim 1 comprising up to 10 percent plasticizer.
Claim 3
Dependent Claim
30 words
A polyvinyl chloride resin composition according to claim 1 in which the dialkyltin thiolactate or thiomalate ester is an ester of an alcohol having from four to 12 carbon atoms.
Claim 4
Dependent Claim
24 words
A polyvinyl chloride resin composition according to claim 1 in which the dialkyltin ester is a dibutyltin bis-(octyl thiolactate) or dibutyltin bis-(octyl thiomalate) ester.
Claim 5
Dependent Claim
31 words
A polyvinyl chloride resin composition according to claim 1 in which the amount of dialkyltin oxide is at least 2 up to about 50 percent by weight of the reaction product.
Claim 6
Dependent Claim
31 words
A polyvinyl chloride resin composition according to claim 1 in which the amount of dialkyltin oxide is at least 5 up to about 40 percent by weight of the reaction product.
Claim 7
Dependent Claim
22 words
A polyvinyl chloride resin composition according to claim 1 in which the tin content is from about 15 to about 25 percent.
Claim 8
Dependent Claim
21 words
A polyvinyl chloride resin composition according to claim 1 in which the dialkyltin oxide is derived from dialkyltin dichloride and alkali.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |